Islamabad: A brawl occurred between Pakistan International Airlines crew members and Prime Minister Yousuf Raza Gilani's son Ali Musa on a flight from Lahore to Karachi, according to a media report on Friday.

Ali Musa, a parliamentarian, insisted that his guard, who had an economy class ticket, would sit with him in the business class, as reported.

The matter was resolved when the captain of the flight intervened and told the premier's son that he would turn the aircraft back to Lahore if he persisted with his demand, which was against the rules.

The threat by the captain worked and Ali Musa gave up his demand, following which the flight continued and landed at Karachi, the report said.